ML20207B948

Proposed Tech Specs,Revising Tables 3.3-7, Seismic Monitoring Instrumentation & 4.3-4, Seismic Monitoring Instrumentation Surveillance Requirements

ML20207B948
Person / Time
Site:	Davis Besse
Issue date:	07/21/1988
From:	TOLEDO EDISON CO.
To:
Shared Package
ML20207B945	List: ML20207B941 ML20207B948
References
NUDOCS 8808040352
Download: ML20207B948 (4)

Text

m Il5ccktNo.'50-346' Licanse No. NPF-3 Serial No. 1539 Attachment 3 E0RMATON ON1 INSTRUMENTATION SEISMIC INSTRUMENTATION LIMITING CONDITION FOR OPERATION 3.3.3.3 The seismic monitoring instrumentation shown in Table 3.3-7 shall be OPERABLE.

APPLICABILITY: At all times.

ACTION:

a. With one or more seismic monitoring instruments inoperable for more than 30 days, prepare and submit a Special Report to the Conmission pursuant to Specification 6.9.2 within the next 10 days outlining the cause of the malfunction and the plans for restoring the instrument (s) to OPERABLE status,

b. The provisions of Specifications 3.0.3 and 3.0.4 are not applicable.

SURVEILLANCE REQUIREMENTS 4.3.3.3.1 Each of the above seismic monitoring instruments shall be demonstrated OPERABLE by the performance of the CHANNEL CHECX, CHANNEL CALIBRATION and CHANNEL FUNCTIONAL TEST operations at the frequencies shown in Table 4.3-4.

4.3.3.3.2 Each of the above seismic monitoring instruments actuated during a seismic event shall be restored to OPERABLE status within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> and a CHANNEL CALIBRATION performed within 5 days folicwing the i seismic event. Data shall be retrieved from actuated instruments and a analyzed to determine the magnitude of the vibratory ground motion. A

, 7,8 Special Report shall be prepared and submitted to the Commission pursuant i N o o. to Specification 6.9.2 within 10 days describing the magritude, frequency j $8 spectrum and resultant effect upon facility features important to safety.

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,Dockht No. 50-346*

Licenze No. NPF-3 Sarial Nov 1539 Attachment 3 Page.3 TABLE 3.3-7 SEISMIC MONITORING INSTRUMENTATION MINIMUM MEASUREMENT INSTRUMENT INSTRUMENTS AND SENSOR LOCATIONS RANGE OPERABLE

1. Strong Motion' Triaxial Accelerometers

a. Containment Concrete Foundation, Elev. 565 119 1

b. Containment Interior Secondary Shield Wall, Elev. 653 1 lg 1

c. Auxiliary Building Basement Floor, Elev. 545 + ig 1 Miniwa k

d. Station site ^300 f t from containment vessel wdu% ~~+ 1g 1 sift, heuduf.

2. Peak Recording Accelerometers Mim o

a. Shield Building Top,"Elev. -809 811 11g 1

b. Auxiliary Building Roof, Elev.

4 660 1 1g 1

, c. Control Room, Elev 623 119 1

3. Seismic Trigger M nimm / #

a. Station site ^300 ft from 1 - to HE containment ' vessel (JNW %e- 0,053-20;;z ~ 1**

(g_ Y' o.005 9 - o . 02.j '* +

requency Response b ye.

• • With cabinet room indication I W* AchMns b $c. l 0 AVIS-BESSE, UNIT 1 3/4 3-38

.DockhdNo.50-346' Licenze No.:NPF-3 Sarial No. 1539 Attachment 3 Page 2 TABLE 4.3-4 SEISMIC MONITORING INSTRUMENTATION SURVEILLANCE REQUIREMENTS CHANNEL CHANNEL CHANNEL FUNCTIONAL INSTRUMENTS AND SENSOR LOCATIONS CHECK CALIBPATION TEST

1. Strong Motion Triaxial Accelerometers

a. Containment Concrete Foundation, Elev. 565 M* R SA

b. Containment Interior Secondary Shield Wall, Elev. 653 M* R SA

c. Auxiliary Building Basement Floor, Elev. 545 ,

M* R SA

d. Station Site A300 ft from containment vessel WSh7 h M* R- SA si 4e boundary

2. Peak Recording Adcelerometers Mminam

a. Shield Building Top d El ev. 409- NA R NA 812.

b. Auxiliary Building Roof, Elev.

660 NA R NA

c. Control Room Elev. 623 NA R NA

3. Slesmic Trigger- .. r Afinimum oT

a. Station Site ^300 f t from M** R SA l containment vessel WrfUnh 5#c boun/4r .

l *Except seismic trigger

• • With cabinet room indication l

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l OAVIS-BESSE, UNIT 1 3/4 3-39

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~- Dock'et No 50-346-License No. NPF-3 Serial No. 1539 Attachment 3

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IN!0 WON DEy 3/4.3 INSTRUMENTATION BASES 3/4.3.3 MONITORING INSTRUMENTATION 3/4.3.3.1 RADIATION MONITORING INSTRUMENTATION The OPERABILITY of the radiation monitoring channels ensures that

1) the radiation levels are continually measured in the areas served by the individual charinels and 2) the alann or autecatic action is initiated when the radiation level trip setpoint is exceeded. ,

3/4.3.3.2 INCORE DETECTORS The OPERABILITY of the incore detectors ensures that the measurements obtained from use of this system accurately represent the spatial neutron flux distribution of the reactor core. See Bases Figures 3-1 and 3-2 for examples of acceptable minimum incore detector arrangemerts.

3/4.3.3.3 SEISMIC INSTRUMENTATION The OPERABILITY of the seismic instrumentation ensures that suffi-cient capability is available to promptly determine the magnitude of a seismic event so that the response of those features important to safety may be evaluated. This capability is required to pennit comparison of the measured response to that used in the design basis for the facility.

This instrumentation is consistent with the recomendations of Regulatory Guide 1.12 "Instrumentation for Earthquakesvj April 1974.

3/4.3.3.4 METEOROLOGICAL INSTRUMENTATION The OPERABILITY of the meteorological instrumentation ensures that sufficient meteorological data is available for estimating potential radiation doses to the public as a result of routine or accidental release of radioactive materials to the atmosnhere. This capability is required to evaluate the need for initiating protective measures to protect the health and safety of the public. This instrumentation is consistent.with the recomendations of Regulatory Guide 1.23 "Onsite Meteorological Programs," February 1972.

3/4.3.3.5 REMOTE SHUTDOWN INSTRUMENTATION The OPERABILITY of the remote shutdown instrumentation ensures that sufficient capability is available to pennf t shutdown and maintenance of

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DAVIS-BESSE, UNIT 1 B 3/4 3-2